<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        div{
            width: 200px;
            height: 200px;
            /* background: linear-gradient(red,yellow,blue,pink); */
            /* background: linear-gradient(to right,green,red,yellow); */
            /* background: linear-gradient(to top,green,red,yellow); */
            /* background: -webkit-linear-gradient(left,green,red,yellow); */
            /* background: linear-gradient(to top right,green,red,yellow); */
            background: -webkit-linear-gradient(bottom left,green,red,yellow);
        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>